Yes, I had not yet seen your followup post when I was writing mine in response to you.
However, you still have it half wrong. While you have now admitted that the "Plan B" pill can prevent ovulation, you are still incorrectly standing by your false assertion that it prevents implantation of fertilized eggs. It does not, and if you had read post #165 more closely, you would have seen that it addresses this issue as well.
OK, you got me; I stand corrected one more time.
However, wouldn't the introduction of progesterone too early before the uterine lining forms be a preventive against implantation? After all, the progesterone IUD is in use now. It can't stop ovulation from its position in the uterus, can it?
Sorry if my info was wrong. I actually don't mean to mislead. It's what I had been taught and I'm sorry.